Ku tirhisiwa ka Lapi ra Mahiselo ya le Henhla ya PTFE eka Vumaki bya Betiri ya Lithium

Tanihi muendli wa xihlovo wa lapi ra mahiselo ya le henhla ya PTFE, . Jiangsu Aokai New Materials yi ku nyika xingheniso xa xiphurofexinali. Eka vumaki bya betri ya lithium, lapi ra mahiselo yale henhla ra PTFE ri tirhisiwa ngopfu eka nsirhelelo, ku hambanyisa na ku hundzisela eka maendlelo ya nkoka hikokwalaho ka ku tiya ka rona ka mahiselo yale henhla, ku nga tirhi ka tikhemikhali na nhundzu yo ka yi nga namarheli. Ku tiya ka yona eka electrolyte corrosion swikatsa swilaveko swo tika swinene swa ti indasitiri kutlula ku lwisana ko olova ka corrosion.

Xitirhisiwa xa Nkoka 1: Vuhumelerisi bya Tielektrode na Nhlengeletano ya Tisele

Eka vumaki bya ti electrode ta betri na maendlelo yo hlengeleta tisele, lapi ra mahiselo yale henhla ya PTFE ritirhisiwa ngopfu eka ku hundzisela, nsirhelelo na ku hambanyisa hi ku tshikilela hi ku hisa.

Electrode Drying Conveyor Belt  Yitirha tani hi conveyor belt hinkarhi wa ku omisiwa ka mahiselo yale henhla ya ti electrodes ta kahle na to biha eka 120°C~180°C. Energy ya yona yale hansi yale henhla yi sivela ku namarhela ka switirhisiwa swa ternary, graphite na swin’wana swa slurries, leswi papalataka ku thyakisa xikan’we naku onhaka ka ti electrode coatings.

Cell Hot Press Sealing  Hiku enta loku tolovelekeke ka 0.18 mm, yitirha tani hi isolation na nsirhelelo wa leyara exikarhi ka hot pressing head na pouch cell hinkarhi wa thermal sealing. Yikota ku kondzelela mahiselo yale henhla ka 240°C, yitiyisisa ku hundziseriwa ka kuhisa loku fanaka, yi sivela ku namarhela xikan’we naku antswisa mbuyelo wa ku paka.

Tab Welding na Hot Press Protection  Yitirhisiwa tani hi xisirhelelo na switirhisiwa swo tihambanisa hinkarhi wa tab welding xikan’we naku hot pressing kwalomu ka 200°C. Ku kombisa insulation yale henhla leyingana dielectric constant yale hansi ka 2.6, kahle kahle yi papalata ti short circuits, yi lwisana na electrolyte vapor, naswona yi sivela ku tlakuka ka ku lwisana loku vangiwaka hi corrosion na oxidation ya copper/aluminum tabs.

Xitirhisiwa xa Nkoka xa 2: Nhlengeletano ya Betiri na Nsirhelelo wa Sisiteme

Eka nhlengeletano ya betri, yi kongomisa eka vuhlayiseki bya gezi na vulawuri bya ku hisa.

Insulation Isolation Between Cells  Yi vekiwile exikarhi ka ti cells ha yin’we, yinyika insulation ya kahle swinene xikan’we na flame retardancy kuya fika eka UL94 V-0 grade , ku sivela ti short circuits xikan’we naku hangalaka ka thermal runaway.

Ti Wiring ta le Ndzeni na Nsirhelelo wa Swiphemu  Yi phutsela ti wiring ta voltage yale henhla na swihlanganisi ku nyika ku pfaleriwa ka mahiselo yale henhla na ku pfariwa, ku papalata swirhendzevutani swo koma leswi vangiwaka hi ku bola ka electrolyte.

Thermal Management System Auxiliary Material  Hi ku anama ka ku tiya ka mahiselo ya -196°C~300°C  na ku fambisa ku hisa loku lawuriwaka, yi tirhisiwa tanihi xitirhisiwa xa le hansi xa ti gaskets to pfalela ku hisa na maphepha yo fambisa ku hisa ku ringanisela mahiselo ya le ndzeni ya tibetiri.

Ku pfariwa ka Betiri hi ku angarhela  Ku tirhisiwa eka ku pfariwa ka tindlu ta betri, yi lwisana na ku nghena ka ndzhongho wa le handle na ku bola ku suka eka ku vupfa kutsongo ka electrolyte ya le ndzeni.

Xilaveko xo Hlawuleka xa 1: Ku Lwisana Kahle eka Swiphemu swo Hambana swa Electrolyte

Electrolyte ya betri ya lithium yi onha swinene, hikokwalaho ku lwisana na tikhemikhali i xikombiso xa nkoka xa matirhelo ya lapi ra mahiselo yale henhla ya PTFE:

Ti Organic Solvents  Swiphemu leswikulu swa electrolyte swofana na Ethylene Carbonate (EC) na Dimethyl Carbonate (DMC) i swintshuxo swa polar swo tiya. Tipulasitiki leti tolovelekeke ti ta pfimba kumbe hambi ku ri ku n’oka loko ti hlangana na tona, kasi PTFE yi tshama yi nga khumbekanga nikatsongo.

Corrosive Electrolytes  Lithium Hexafluorophosphate (LiPF2), munyu wa electrolyte wa nkoka, wuva na vuxiyaxiya eka ndzhongho na kuhisa naswona wu bola hiku olova kuva wu humesa Hydrofluoric Acid (HF). HF yi onha swinene naswona yinga onha nghilazi na tinsimbi totala. Lapi ra mahiselo yale henhla ra PTFE ri tisa ku tiya loku hlamarisaka eka hydrofluoric acid naswona ri hlayisa matirhelo yo tiya eka tindzhawu to tika to tano.

Kutshamiseka ka tikhemikhali ta gezi  Ehansi ka swiyimo swa ntirho wa voltage yale henhla na charge-discharge endzeni ka tibetiri, PTFE yina swivumbeko swa tikhemikhali leswi tiyeke, leswi humesaka ku hava ku cinca ka matlhelo na electrolyte naswona ku hava ku bola ka catalytic ka electrolyte.

Salt Spray Corrosion Resistance  Ku khuluka ka electrolyte swi endla xifafazeri xa munyu lexi onhaka swinene, laha lapi ra mahiselo yale henhla ra PTFE ri kombisaka ku tiyisela lokunene.

Xilaveko xo Hlawuleka xa 2: Ku Hlangana na Swiyimo swo Tika swa Ntirho wa Betiri

Swihlawulekisi swa xiyimo xa le henhla swa swilo i swa nkoka; ku tshamiseka ka nkarhi wo leha eka tindhawu ta xiviri ta betri ku fanele ku hundza swikambelo swo tika swa matirhelo:

Electrolyte Immersion Aging Test  Leyi i ndlela yo tiyisisa leyi kongomeke swinene na ya nkoka swinene. Tisampulu ti cheriwa eka simulated electrolyte naswona ti hlayisiwa kuringana masiku kumbe mavhiki eka mahiselo ya kamara kumbe mahiselo yale henhla yofana na 60°C na 85°C. Switirhisiwa leswi faneleke swikombisa kungari na swirhumbana swale henhla, delamination kumbe dissolution na ku lahlekeriwa hi ntiko wale hansi swinene.

Hiku komisa, lapi ra mahiselo yale henhla ra PTFE ri tirha tani hi xifunengeto xo sirhelela, xisirhelelo xo tihambanisa na xitirhisiwa xo hundzisela eka vumaki hinkwabyo bya betri ya lithium. Kungava ku tiyisela ku bola lokukulu ka electrolyte endzeni ka ti cells kumbe ku nyika nsirhelelo lowu tiyeke eka maendlelo ya mahiselo yale henhla yofana naku tshikelela hiku hisa naku welda, matirhelo ya yona yo tshembheka i ya nkoka ku tiyisisa mbuyelo wa vuhumelerisi, vuhlayiseki bya ntirho xikan’we na vutomi byo leha bya xirhendzevutani xa tibetiri ta lithium.

Rungula leri nga laha henhla ri nyikiwile hi Jiangsu Aokai Switirhisiwa Leswintshwa Thekinoloji Co., Ltd.

Loko u lava ku dyondza hi vuxokoxoko hi tipharamitha ta xithekiniki, swiyimo swa ku tirhisiwa na swintshuxo leswi endleriweke wena swa nxaxamelo wa hina hinkwawo wa swikumiwa, ku katsa na lapi ra mahiselo ya le henhla ya PTFE, thepi yo namarhela ya mahiselo ya le henhla ya PTFE, bandi ra mesh ra mahiselo ya le henhla ya PTFE, bandi ra muchini ro hlanganisa leri nga riki na swirhabyani, lapi leri funengetiweke hi tlhelo rin’we ra PTFE, bandi ro fambisa leri nga tiyangiki eka mahiselo ya le henhla na mahiselo ya le henhla lapi ra fiberglass leri nga tiyangiki, hi kombela u hi tihlanganisa hi ku tirhisa:

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